In a nutshell:

React Native: It works fine but if you want to add more libraries (and in the 99% of the case, we use a lot of libraries, cause react native is limited), then everything could break everywhere. Commonly, devs don't update dependencies for that reason.

MAUI and Xamarin: it is a bug-fest. Even a simple example crashes constantly.

Flutter in comparison is quite stable to develop and to deploy.